As far as I know the only answer to this is NO, unless.. you might try finding a trainer.. (google trainer sniper elite) and see if you find anything be careful hower and make sure you virus scan it as I've heard some reported trainers for Sniper Elite have worms, and virii.. hope that helps.
DWM-Sniper
A2:
Yes there is... Use the profile name reb00, and you can have God mode and several other cheats as well... after starting a new game with that profile name, hit the esc key and select cheats from the menu. voila!
When mision starts, crawl slowly to the wall straight in front of you, then turn right and make your way down it carefully without being detected till you reach a hole in the wall.
I assume you mean the level with the French Cathedral.
1, Use stick grenade across top steps of building by old VW.
2, Use stick grenade from VW back to the pillbox,
3, When you get inside the cathedral, place a stick grenade across the entrance to spiral stairs.(after you are inside the stairwell). go to 1st level and watch for 2 guards, use the silencer.(best place to hide is either under the first level staircase and wait for guard descending or wait just to the side where the table which has the extra ammo, etc) The second guard is not far behind, although he may be guarding the ammo and the torch at the dome of the cathedral.Again use the pistol.
4, Now comes the crunch, to stop the captive being shot, watch the two snipers, one on roof of the building where you put first stick grenade, and the second sniper is across the street exactly opposite the entrance from where you are firing.
5, Now keep firing at the nazis to protect captive, he will take up position near the monument.
6,Now a vital point, look behind to the right from the tower toward the courtyard with the two pilboxes, stop the enemy fro coming from there, and if POSSIBLE take out the staff car as it chases the rescue truck (vital)
7, now that the truck and captive are away watch your back as you exfiltrate, the way you came in over the rubble .try to get to the first floor level and place a stick grenade across it.
8, From here its not too bad as most of the axis are dead.best of luck.
I have also seen it... A player even threatened to cheat if the rest of the room didn't vote another player out. He then went invisible and killed everyone.
There are certain areas on some of the maps that allow you to slide/climb over barricades i.e ,meet the informant ,where you can go invisible and shoot through buildings..its glitches in the programme that allow you to stay hidden but be able to shoot anyone on anywhere on the map even through buildings..